Support DefaultInstanceWarmup of AutoScalingGroup

[BDeus]

Name of the resource

AWS::AutoScaling::AutoScalingGroup

Resource name

No response

Description

The Property of AutoScalingGroup DefaultInstanceWarmup is the recommended way by AWS to declared the warmup at group level and not alarm one.

Cloudformation has enabled the possibility to set it but it's currently unsupported as documentation mention

Other Details

No response

[rgoltz]

Hi @BDeus - The CloudFormation documentation now worded support for DefaultInstanceWarmup as setting for AWS::AutoScaling::AutoScalingGroup. It's also already supported in CDK as well: aws/aws-cdk#23285 + aws/aws-cdk#23180

Based on our last testing, there's a catch: Once you set DefaultInstanceWarmup in your CFN Template, CloudFormation Drift Detection reporting this valid and correctly set property as a drift. It's a false-postive, which needs to be fixed.